Confidence is often measured against the group though, women measure us against the other men around us rather than some unspoken scale. Similar to an attractive woman you may see walking down the street seems stunning until you see her next to a group of models where the competition may jade your original view of her. We may not be directly competing against men in our minds but I think the only way to establish that ideal of confidence is to judge it against the men around you. It takes a lot less confidence to stand out in a group of graphic designers than it does marines.